Yoga is unique in that it is the only medieval physical fitness art that does not involve firing crossbows at a grendel. Bend and stretch bloodlessly with today's Groupon: for $35, you get one-month of unlimited classes at Yoga at Cindy's in Sunnyvale (a $165 value).

Yoga at Cindy's takes a variety of yoga styles and places them into a heated environment. Using hot air harvested from the egos of smug astronauts, the rooms are heated between 90 and 98 degrees, which leads to improved detoxification and warm, malleable muscles. The studio offers classes for all levels, from non-nimble newcomers to yoga veterans as flexible as the space-time continuum. A flexible schedule ensures that students will find a time to engage in heated flexing no matter the night shift, 9-to-5, or sub-temporal job, with the number of classes soon to be doubled thanks to a second yoga room. Each one is led by a friendly, experienced instructor who will keep the class quality high, while maintaining a non-competitive, healthy environment.

Heated yoga practice is an excellent way to purge a clogged system of malingering toxins, re-center a topsy-turvy nervous system, and build stamina from a slushy puddle to an upright, impervious snowman. Whether engaging in vinyasa or more vigorous power flows, the charming atmosphere at Cindy's is an ideal place to get into a committed routine. From the neutral-hued lobby, dotted with potted plants and eastern decorative touches, to the airy expanse of the gossamer curtain-lined studio, the yoga center exudes an air of relaxation.